Star Brite Super Scrubber Fine Available in Fine (White), Medium (Red) and Coarse (Black) Removable ergonomic grip fits comfortably in your palm for reduced hand strain Attaches to all Star brite Extend-A-Brush handles with Star brite's Adjustable Knuckle (40030) Using with Extend-A-Brush handle & Adjustable Knuckle allows you to reach over and clean the sides of boat or other hard to reach areas Ideal for cleaning heavy deposits on boat hulls